feat(contracts): As an Issuer, I want to have dedicated logic on ”attest” and “replace” workflows

[satyajeetkolhapure]

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What does this PR do?

It adds operation type to distinguish between attest and replace workflows

Related ticket

Fixes #648

Type of change

• [ ] Chore
• [ ] Bug fix
• [x] New feature
• [ ] Documentation update

Check list

• [x] Unit tests for any smart contract change
• [ ] Contracts and functions are documented

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.61%. Comparing base (e99f776) to head (e02d096). Report is 19 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #651      +/-   ##
==========================================
+ Coverage   92.07%   94.61%   +2.53%     
==========================================
  Files          30       30              
  Lines         492      501       +9     
  Branches      112      112              
==========================================
+ Hits          453      474      +21     
+ Misses         39       27      -12     

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[alainncls]

Pending a community vote

[alainncls]

The proposal passed the vote ✅